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Radiant|Lab Grown|IGI

1.64ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG705509687

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG705509687

Diamond specifications and retailer prices

From $494 AUD
$347 USD
As of October 30, 2026
Save $4,289 AUD (90%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $5,609 AUD at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 1.64ct lab-grown radiant diamond

This 1.64ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG705509687 or 705509687. Listed at 28 retailers as of October 30, 2026, with a 868% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.64
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.7°
Pavilion angle33.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG705509687
Dimensions8.89 × 5.91 × 3.77 mm
L/W Ratio1.50
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.89 mm5.91 mm1.64 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG705509687
Side View
Table 60.0%Crown 38.7°Girdle: MediumPavilion 33.1°Culet: NoneDepth 63.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $4,783 AUD|Low: $487 AUD|High: $5,879 AUD|Avg: $1,825 AUD|-18.6%
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 11
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Retailer 24
November 1, 2026
Retailer 12$487 AUD
Retailer 7$494 AUD
Retailer 10$565 AUD
Retailer 16$604 AUD
Retailer 6$765 AUD
Retailer 22$769 AUD
Retailer 13$796 AUD
Retailer 23$922 AUD
Retailer 11$1,009 AUD
Retailer 21$1,038 AUD
Retailer 18$1,084 AUD
Retailer 5$1,308 AUD
Retailer 19$1,402 AUD
Retailer 3$1,681 AUD
Retailer 14$1,942 AUD
Retailer 17$2,002 AUD
Retailer 4$2,103 AUD
Retailer 8$2,192 AUD
Retailer 9$2,219 AUD
Retailer 15$2,343 AUD
Retailer 2$2,421 AUD
Retailer 24$3,915 AUD
Retailer 20$3,943 AUD
Brilliant Earth$4,783 AUD

33 data points across 24 retailers

28 retailers$494 AUD to $4,783 AUD

Retailer 1
-
$487 AUD
$342 USD
Price last confirmed 10 days ago
A
Retailer 2
-
$494 AUD
$347 USD
View
Final sale: no returns
Retailer 3
-
$565 AUD
$397 USD
View
Price last confirmed 11 days ago
Retailer 4
-
$604 AUD
$424 USD
View
Price last confirmed 16 days ago
Retailer 5
-
$604 AUD
$424 USD
View
Price last confirmed 10 days ago
A
Retailer 6
-
$765 AUD
HK$4,200 HKD
View
A
Retailer 7
-
$769 AUD
$540 USD
View
A
Retailer 8
-
$796 AUD
$559 USD
View
A
Retailer 9
-
$922 AUD
$648 USD
View
Retailer 10
-
$1,009 AUD
€675 EUR
View
Price last confirmed 8 days ago
A
Retailer 11
-
$1,038 AUD
ZAR 11,779 ZAR
View
A
Retailer 12
-
$1,084 AUD
£600 GBP
View
A
Retailer 13
-
$1,308 AUD
$919 USD
View
A
Retailer 14
-
$1,402 AUD
View
B+
Retailer 15
-
$1,681 AUD
$1,181 USD
View
Retailer 16
-
$1,942 AUD
$1,364 USD
View
Price last confirmed 10 days ago
B+
Retailer 17
-
$2,002 AUD
$1,407 USD
View
B+
Retailer 18
-
$2,063 AUD
$1,449 USD
View
B+
Retailer 19
-
$2,103 AUD
$1,477 USD
View
B+
Retailer 20
-
$2,192 AUD
$1,540 USD
View
B+
Retailer 21
-
$2,219 AUD
SGD 2,106 SGD
View
Retailer 22
-
$2,343 AUD
£1,296 GBP
View
Price last confirmed 10 days ago
B+
Retailer 23
-
$2,421 AUD
£1,339 GBP
View
B
Retailer 24
-
$3,915 AUD
$2,750 USD
View
B
Retailer 25
-
$3,943 AUD
$2,770 USD
View
B
Retailer 26
-
$4,303 AUD
£2,380 GBP
View
B
Retailer 27
-
$4,783 AUD
$3,360 USD
View
Most Expensive
Brilliant Earth
14166265A · Oct 24
$5,609 AUD
$3,940 USD
View
Price last confirmed 7 days ago
27 more retailers have this diamond
Prices start from $494 AUDSave up to $4,289 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.64ct Radiant
$494 AUD